Indications of chemical bond contrast in AFM images of a hydrogen-terminated silicon surface

Download
  1. (PDF, 1 MB)
  2. Get@NRC: Indications of chemical bond contrast in AFM images of a hydrogen-terminated silicon surface (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1038/ncomms14222
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleNature Communications
ISSN2041-1723
Volume8
Article number14222
AbstractThe origin of bond-resolved atomic force microscope images remains controversial. Moreover, most work to date has involved planar, conjugated hydrocarbon molecules on a metal substrate thereby limiting knowledge of the generality of findings made about the imaging mechanism. Here we report the study of a very different sample; a hydrogen-terminated silicon surface. A procedure to obtain a passivated hydrogen-functionalized tip is defined and evolution of atomic force microscopy images at different tip elevations are shown. At relatively large tip-sample distances, the topmost atoms appear as distinct protrusions. However, on decreasing the tip-sample distance, features consistent with the silicon covalent bonds of the surface emerge. Using a density functional tight-binding-based method to simulate atomic force microscopy images, we reproduce the experimental results. The role of the tip flexibility and the nature of bonds and false bond-like features are discussed.
Publication date
PublisherNature Publishing Group
LanguageEnglish
AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number23001529
Export citationExport as RIS
Report a correctionReport a correction
Record identifier964e924a-546e-4393-9598-94b4b75b1d6f
Record created2017-03-02
Record modified2017-03-02
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: